backup.sh

readonly ROOT="/home/eeems"
readonly PIDFILE="$ROOT/var/backup.pid";
log(){
  echo "[$(date --iso-8601=seconds)] $1";
}
checkpid(){
  if [ -f "$PIDFILE" ]; then
    local PID=$(cat "$PIDFILE");
    ps -p $PID > /dev/null 2>&1;
    if [ $? -eq 0 ]; then
      log "Process already running";
      return 1;
    else
      log "Found old PID file";
    fi;
  fi;
  echo $$ > "$PIDFILE";
  if [ $? -ne 0 ]; then
    log "Could not create PID file";
    return 1;
  fi;
  trap "rm -f $PIDFILE" EXIT
  return 0;
}
backup(){
  if [ ! -f $ROOT/etc/backup.d/$1.sh ];then
    log "Backup script for $1 doesn't exist";
    return 1;
  fi;
  log "Starting backup of $1...";
  if ! $ROOT/etc/backup.d/$1.sh > $ROOT/var/log/backup.d/$1.log 2>&1;then
    log "Backup of $1 failed!";
    return 1;
  fi;
  log "Finished backup of $1";
  return 0;
}
cleanup(){
  unset -f log;
  unset -f checkpid;
  unset -f backup;
  unset -f cleanup;
  unset -f main;
}
main(){
  if ! checkpid;then
    cleanup;
    exit 1;
  fi;
  log "Starting backups";
  backup eeems &
  backup omnimaga &
  log "Waiting for jobs...";
  wait;
  log "Finished waiting";
  backup whiterabbit;
  log "Done";
  cleanup;
}
main;